docs(architecture): add Prowler App architecture diagram (#5914)

docs/index.md

@@ -214,6 +214,22 @@ You can run Prowler from your workstation, a Kubernetes Job, a Google Compute En
 
 ![Architecture](img/architecture.png)
 
+### Prowler App
+
+The **Prowler App** consists of three main components:
+
+- **Prowler UI**: A user-friendly web interface for running Prowler and viewing results, powered by Next.js.
+- **Prowler API**: The backend API that executes Prowler scans and stores the results, built with Django REST Framework.
+- **Prowler SDK**: A Python SDK that integrates with the Prowler CLI for advanced functionality.
+
+The app leverages the following supporting infrastructure:
+
+- **PostgreSQL**: Used for persistent storage of scan results.
+- **Celery Workers**: Facilitate asynchronous execution of Prowler scans.
+- **Valkey**: An in-memory database serving as a message broker for the Celery workers.
+
+![Prowler App Architecture](img/prowler-app-architecture.png)
+
 ## Deprecations from v3
 
 ### General